зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
2.2 KiB
HTML
91 строка
2.2 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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-->
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<head>
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<title>ArrayBuffer stream test</title>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<script type="text/javascript">
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function detachArrayBuffer(ab)
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{
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var w = new Worker("data:application/javascript,");
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w.postMessage(ab, [ab]);
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}
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function test()
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{
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var ab = new ArrayBuffer(4000);
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var ta = new Uint8Array(ab);
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ta[0] = 'a'.charCodeAt(0);
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const Cc = SpecialPowers.Cc, Ci = SpecialPowers.Ci, Cr = SpecialPowers.Cr;
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var abis = Cc["@mozilla.org/io/arraybuffer-input-stream;1"]
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.createInstance(Ci.nsIArrayBufferInputStream);
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var sis = Cc["@mozilla.org/scriptableinputstream;1"]
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.createInstance(Ci.nsIScriptableInputStream);
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sis.init(abis);
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is(sis.read(1), "", "should read no data from an uninitialized ABIS");
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abis.setData(ab, 0, 256 * 1024);
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is(sis.read(1), "a", "should read 'a' after init");
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detachArrayBuffer(ab);
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SpecialPowers.forceGC();
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SpecialPowers.forceGC();
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try
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{
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sis.read(1);
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ok(false, "reading from stream shouldn't have worked");
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}
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catch (e)
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{
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ok(e.result === Cr.NS_BASE_STREAM_CLOSED,
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"detaching underneath an input stream should close it");
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}
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// A regression test for bug 1265076. Previously, overflowing
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// the internal buffer from readSegments would cause incorrect
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// copying. The constant mirrors the value in
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// ArrayBufferInputStream::readSegments.
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var size = 8192;
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ab = new ArrayBuffer(2 * size);
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ta = new Uint8Array(ab);
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var i;
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for (i = 0; i < size; ++i) {
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ta[i] = 'x'.charCodeAt(0);
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}
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for (i = 0; i < size; ++i) {
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ta[size + i] = 'y'.charCodeAt(0);
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}
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abis = Cc["@mozilla.org/io/arraybuffer-input-stream;1"]
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.createInstance(Ci.nsIArrayBufferInputStream);
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abis.setData(ab, 0, 2 * size);
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sis = Cc["@mozilla.org/scriptableinputstream;1"]
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.createInstance(Ci.nsIScriptableInputStream);
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sis.init(abis);
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var result = sis.read(2 * size);
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is(result, "x".repeat(size) + "y".repeat(size), "correctly read the data");
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}
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test();
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</script>
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</head>
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<body>
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<p id="display"></p>
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<div id="content" style="display: none"></div>
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<pre id="test">
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</pre>
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</body>
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</html>
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